Leakproof container



May 27, 1947.

J. PRESS LEAKPROOF CONTAINER original Filed Dee. 14. 195s HHIIIIIJ Il llllllllllllllllllllll n ATTORN e/Lc/ Press;

Reissued May 27, 1947 22,885 LEAKPROOF CONTAINER Jack Pre'ss, Rahway, N. J. Original No. 2,301,580, dated November 10, 1942,

Serial No. 309,225, December 14, 1939. reissue September 16, 1943,

plication for No. 502,697

3 Claims.

Ap- Serial My invention relates to a new and useful improvement in a leak-proof container formed from cardboard, paper, or the like, and adapted for reception of liquids and solids of various kinds, and particularly oils and greases, and so arranged and constructed that the passage of liquids through the container either in its body or at its connecting joints will be prevented.

-Another object of the invention is the provision of a method of forming a leak-proof container of this class.

Another object of the invention is the provision of a container of this class having a liner inserted in the container with a layer of leak-proofing material positioned between the liner and the container.

Another object of the invention is the provision of a container of this class comprising a liner positioned in the containerl and serving as a covering of the inner surface thereof with a layer of leak-proofing material positioned between the liner and the inner surface of the container and serving as a means of adhesion between the liner and the container.

Other-objects will appear hereinafter.

It is recognized that various modications and changes may be made in the invention ous departures from the detail of structure illustrated without departing from the spirit and scope of the invention, and it is intended that such variations, modifications, and departures shall be embraced within the scope hereof.

Submitted herewith and forming a part hereof is a drawing, in which:

Fig. 1 is a side elevational view of a form on which a container may be made.

Fig. 2 is a side elevational view of the form enveloped with a covering of lining material.

Fig. 3 is a side elevational view similar to Fig. 2 with the outer surface of the lining material covered with a suitable leak-proofing material.

Fig. 4 is a central sectional view of the container mounted on the form with the liner in position, slightly enlarged over the structure vshown in Figs. l, 2 and 3.

Fig. 5 is a sectional view of a container blank having the inner surface covered with leak-proofing material.

Fig. 6 is a central enlarged sectional view of a container in its completed form constructed from the blank illustrated in Fig. 5.

Fig. '7 is a fragmentary sectional view taken on line 1--1 of Fig. 6 slightly enlarged. 5 y

Fig. 8 is an end elevational view withna cover applied and partly broken away.

' is also desirable that and variv l sessed of adhesive Fig. 9 is ,a side elevational view of a different type of form.

Fig. 10 is a central sectional view of a partly formed container or carton having the inner suri ace thereof covered with leak-proofing material.

Fig. 11 is the form illustrated in Fig. 9 with a covering of lining material positioned thereover.

Fig. 12 is a central sectional view showing the form illustrated in Fig. 11 inserted into the container illustrated in Fig, 10.

Fig. 13 is a central sectional view of the structure shown in Fig. 12 in another position of formation prior to the removal of the form.

Fig. 14 is a side elevational view of the container illustrated in Fig. 13 with the form removed therefrom.

Fig. 15 is a semi-diagrammatic view illustrating the method of forming a tubular container.

Fig. 16 is a fragmentary side elevational view of a tuloulal` container in the process of formation.

In the construction of of this class, it is necessary dium be insoluble in liquid which is to that the sealing methe oil, grease, or other be placed in the container. It

the sealing agent be poschipping or cracking characteristics at low temperatures. It is of the material into the body of the container be eliminated or at least reduced to a minimum and these features have been kept in mind in developing the present invention. Some of these .advantages are obtainedas a result of the kind of leak-proong material used, while the majority of them are present because of the method of formation and the particular type of construction resorted to. Y

In Fig. 1 I have illustrated-a form 25 projecting upwardly from which is a shaft 26. This form serves as the member around which the cardboard is pressed when forming the blank cover this form 25.

into the shape of the receptacle desired. While l have illustrated a form which is rectangular in cross section, it is believed obvious that different shapes of containers may be used while embodying the invention and different shaped forms also used. In carrying out the invention, 1 slip or form a covering 21 over the form 25 so as to This covering 21 forms a liner'fer the container torbe formed and this liner may be of any desired material, such as paper, tin foil, or the like, although I prefer to use a ne tissue paper. When this paper is placed over the form 25 it is in the nature of 'a leak-proof containers qualities .andbe free from any also necessary Ithat penetration .formed as shown in Fig.

the container is not to be lled within the container,

.manner is most sack and its physical contact with the face of the form is sufficient to retain this covering on the form. In carrying out the invention as illustrated in Figs. 3 and 4, ,I resort to a slightly different practice than I do in carrying out the invention according to Fig. 5 and Fig. 6, and Fig. to Fig. 14. In carrying out the invention in accordance with the disclosure in Fig. 3 and Fig. 4, after the liner 21 is placed on the form 25, the outer face of the liner is covered with the leakproong material, which may be in the nature of a suitable rosin or other so-called waterproofing or leak-proofing material. The application of the leak-proofing materialy to the outer face of the liner 21 may be by dipping or immersion, spraying, ,or any other suitable method of application. After the application of the coating of leak-proofing material to the liner 21, the form 25 may be rotated at high speeds so as to remove from the outer surface of the liner which is mounted thereon any excess of leak-proofing material. This centrifuging action assures a smooth, even lm, evenly distributed and of uniform thickness over the area of the liner. After the application of the leak-proofing material, the cardboard 28 or other medium with which it is intended to construct the container is folded around the structure illustrated in Fig. 3 so that the inner face' of the container body` 28 is pressed against the layer 29 of leak-proofing material which has been deposited on the outer surface of the liner 21. After the structure is 4, the form 25 is reis then adapted for other material which I prefer to use a cupshaped cover, the side Walls of which would overlap the end of the container, although it is believed obvious that various types of covers may be used with satisfactory results. Where the cup-shaped cover telescoping over the end of the container is used, the end of the container is dipped or otherwise provided on its outer surface at its end with a layer of the leak-prooflng adhesive material so that when the cover is placed in pos1t1on after the container has been moved and the container In the event that immediately after its formation so that the layer of leak-proong material l29 shown in Fig. 4 should become dried or non-tacky, the inner surface of the cover 33 may be covered with a layer 29 of adhesive prior to its being placed over the container. If desired, the cover may be constructed according to the-method described for the construction of the container with a liner covering the inner face of the cover, and in such event the telesealecl relation to each other.

possible to apply a leakcontainer which will absorption of the material while affording a container easily handled for filling purposes. Experience has shown that a container constructed in this eicient for the purposes intended.

In the forms shown in Figs. 5 and 6, I proceed .to place the liner 21 over the form 25 as shown in Fig. 2, but instead of covering the outer face .of the liner withv a leak-proofing material as shown in Fig. 3, I.cover the inner face of the the container will be inv into the liner. In this way the container is formed about the form.

In this structure illustrated in Fig. 6, I provide a bottom consisting of a cap 31 which is cup-shaped and provided with a side wall 38. The bottom of this cap is provided with a layer 39 of adhesive leak-proofing material and a layer In Fig. 10 to Fig. 14 I have shown a slightly different type of container. slipped over the form 25' is a suitable liner 39 proofing material, the outer-faces of the liner may carry the leakproofing material, if desired. If desired, the liner may be extended beyond the ends of the container, in which event the liner would be folded inwardly to provide a seal. In the form shownV in Fig. 4 the liner is shorter than the container and the inner surface of the container projecting beyond the liner is provided with a coating |29 of leakproong material. The container body 23" is tact the liner. If desired, the container may be In Figs. 15 and 16 I have illustrated the invention applied to a tubular container. From a roll 42 of calendered paper is fed a strip 43 which passes over and is in contact with a roller 44, rolling in a resincus solution 45 so that the inner face of the layer 43 will. be covered with' the adhesive leak-proofing material. From a. roll 43 is fed a strip 41 of liner material, such as tissue paper, which is brought into engagement with the inner face of the strip 43 by means of the roller are rolled on a mandril 49, the strips 43` engaging eachother at their edges and the strips 41being wound on the mandril or arbor inV overlapping relation. as shown in Fig. 16. The strip 41 contacts the adhesive- In the latter case the leak-` carrying roller 46 so that the strips 43 and 41 are secured together with two layers of adhesive leakproof material between them. The strips 43 are covered by the strip 128 which is spirally Wound with its edges engaging each other.

The leak-proofing material may be either liquid, a molten normally congealed product, or a product normally plastic or of a paste-like consistency.

It is believed obvious that -the container may be used for other materials than liquids, oils, and greases, because the container is moisture-proof and would be adapted for reception of other materials which it was desired to shield from moisture.

It willbe noted that the invention lends itself to high-speed production inasmuch as the leakproofing is accomplished during the operation of producing the container. It will also be noted that in addition to the advantages enumerated, the invention eliminates direct contact between the sealing medium and the form, thus preventing dtainer, the steps consisting in shaping a liner to the shape of the container, coating the outer surface of the liner with a leak-proofing material and rotating the coated liner at high speeds for removing excessive leak-proofing material and uniformly distributing the same over the liner.

2. In the method of forming a leak-proof container, the steps consisting in shaping a liner rto the shape of the container, coating the outer surface of the liner with a leak-proofing material and rotating the coated liner at high speeds for removing excess leak-proofing material and uniformly distributing the same over the liner, and inserting the liner into the container and bringing the inner surface of the container into contact with the leak-proofing coating lon the outer surface of the liner. l

3. In the method of forming a leak-proof container, the steps consisting in shaping a liner to the shape of the container, coating the outer surface of the liner with high speeds for removing excess leak-proofing material and uniformly distributing the same over the liner, and applying sheet material of the cardboard type to the formed liner film thereon within said container body.

JACK PRESS.

REFERENCES CITED The following references are of record in the le of this patent: f UNITED .STATES PATENTS Number Name Date 218,193 Preater Aug. 5, 1879 1,203,832 Wood Nov. 7, 1916 156,694 Chinnock Nov. 10, 1874 966,186 Fallon I Aug. 2, 1910 1,442,775 Wood Jan. 16, 1923 1,498,909 Grimm June 24, 1924 leak-proofing material and rotating the coated liner at to provide a container bodyv enclosing the formed liner and the leak-proofing 

